I'm collecting some data for school and need data from as many people as possible. Thanks!

Who can solve this problem in one try without looking at the answer?

A fool wants to tie a rope around the earth. So he buys a rope of 40,000 KM and ties it around the world. His neighbour, also a fool, wants to do the same only he wants the rope on sticks 1 meter above the ground.

How much more rope does he need?

And how much more rope do you need when you use a tennis ball instead of the earth?

Be honest! And be sure to leave a post saying whether or not you get it on the first try!

The answer can be found at http://mindcipher.com/puzzle/42-don-t-hang-yourself

Thanks for your help!